Patients from the second group will receive Humira® subcutaneously (SC) at a dose 80 mg on week 0, then at a dose 40 mg on weeks 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21 and 23. At week 25 participants will re-randomized (1:1) to treatment with Humira® or will transitioned to BCD-057.They will receive Humira® or BCD-057 at a dose 40 mg on weeks 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49 and 51.